library(tidyverse)
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library(WGCNA)
Loading required package: dynamicTreeCut
Loading required package: fastcluster

Attaching package: ‘fastcluster’

The following object is masked from ‘package:stats’:

    hclust


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Attaching package: ‘WGCNA’

The following object is masked from ‘package:stats’:

    cor
library(gplots)

Attaching package: ‘gplots’

The following object is masked from ‘package:stats’:

    lowess
options(stringsAsFactors = FALSE)

load sample info

sample.description <- read.csv("../output/sample.description.sporophyte.all.csv")

load reads

lcpm <- read.csv("../output/sporophyte_combined_log2cpm.csv.gz", row.names = 1, check.names = FALSE)
head(lcpm)
dim(lcpm)
[1] 29409   109

Filter for genes with the highest coefficient of variation

CV <- apply(lcpm, 1, \(x) abs(sd(x)/mean(x)))
hist(log10(CV))

names(CV) <- rownames(lcpm)
CV[str_detect(names(CV), "18G076300|33G031700")]
Ceric.18G076300.v2.1 Ceric.33G031700.v2.1 
           0.1437800            0.5919531 
quantile(CV, 0.25)
      25% 
0.1323597 

LFY2 has a pretty low CV; have to include 25% of the genes by CV to include it.

lcpm.filter <- lcpm[CV > quantile(CV, 0.25),]
dim(lcpm.filter)
[1] 22056   109

WGCNA wants genes in columns

lcpm.filter.t <- t(lcpm.filter)

Soft thresholding

powers <- c(c(1:10), seq(from = 12, to=20, by=2))
sft <- pickSoftThreshold(lcpm.filter.t, powerVector = powers, verbose = 5,networkType = "signed hybrid", blockSize = 20000)
 pickSoftThreshold: calculating connectivity for given powers...
   ..working on genes 1 through 20000 of 22056
Warning: executing %dopar% sequentially: no parallel backend registered
   ..working on genes 20001 through 22056 of 22056
sizeGrWindow(9, 5)
par(mfrow = c(1,2))
cex1 <- 0.9
# Scale-free topology fit index as a function of the soft-thresholding power
plot(sft$fitIndices[,1], -sign(sft$fitIndices[,3])*sft$fitIndices[,2],
     xlab="Soft Threshold (power)",ylab="Scale Free Topology Model Fit,signed R^2",type="n",
     main = paste("Scale independence"))
text(sft$fitIndices[,1], -sign(sft$fitIndices[,3])*sft$fitIndices[,2],
     labels=powers,cex=cex1,col="red")
# this line corresponds to using an R^2 cut-off of h
abline(h=0.90,col="red")
# Mean connectivity as a function of the soft-thresholding power
plot(sft$fitIndices[,1], sft$fitIndices[,5],
     xlab="Soft Threshold (power)",ylab="Mean Connectivity", type="n",
     main = paste("Mean connectivity"))
text(sft$fitIndices[,1], sft$fitIndices[,5], labels=powers, cex=cex1,col="red")

choose 5

softPower <- 5
adjacency <- adjacency(lcpm.filter.t, power = softPower, type = "signed hybrid")
# Turn adjacency into topological overlap
TOM <- TOMsimilarity(adjacency, TOMType = "signed");
..connectivity..
..matrix multiplication (system BLAS)..
..normalization..
..done.
dissTOM <- 1-TOM
# Call the hierarchical clustering function
geneTree <- hclust(as.dist(dissTOM), method = "average")
# Plot the resulting clustering tree (dendrogram)
sizeGrWindow(12,9)
plot(geneTree, xlab="", sub="", main = "Gene clustering on TOM-based dissimilarity",
     labels = FALSE, hang = 0.04)

define modules

# We like large modules, so we set the minimum module size relatively high:
minModuleSize <- 30;
# Module identification using dynamic tree cut:
dynamicMods <- cutreeDynamic(dendro = geneTree, distM = dissTOM,
                             deepSplit <- 2, pamRespectsDendro = FALSE,
                             minClusterSize = minModuleSize);
 ..done.
table(dynamicMods)
dynamicMods
   1    2    3    4    5    6    7    8    9   10   11   12   13   14   15   16   17 
4035 2424 1505 1341 1325 1227  991  810  663  648  595  539  535  496  485  435  435 
  18   19   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34 
 416  332  325  306  275  249  248  213  204  196  184  172  165   91   75   70   46 
# Convert numeric labels into colors
dynamicColors = labels2colors(dynamicMods)
table(dynamicColors)
dynamicColors
         black           blue          brown           cyan      darkgreen 
           991           2424           1505            496            275 
      darkgrey    darkmagenta darkolivegreen     darkorange        darkred 
           248             46             70            204            306 
 darkturquoise          green    greenyellow         grey60      lightcyan 
           249           1325            595            435            435 
    lightgreen    lightyellow        magenta   midnightblue         orange 
           416            332            663            485            213 
 paleturquoise           pink         purple            red      royalblue 
            91            810            648           1227            325 
   saddlebrown         salmon        skyblue      steelblue            tan 
           172            535            184            165            539 
     turquoise         violet          white         yellow 
          4035             75            196           1341 
# Plot the dendrogram and colors underneath
sizeGrWindow(8,6)
plotDendroAndColors(geneTree, dynamicColors, "Dynamic Tree Cut",
                    dendroLabels = FALSE, hang = 0.03,
                    addGuide = TRUE, guideHang = 0.05,
                    main = "Gene dendrogram and module colors")

merge similar modules

# Calculate eigengenes
MEList <- moduleEigengenes(lcpm.filter.t, colors = dynamicColors)
MEs <- MEList$eigengenes
# Calculate dissimilarity of module eigengenes
MEDiss <- 1-cor(MEs);
# Cluster module eigengenes
METree <- hclust(as.dist(MEDiss), method = "average");
# Plot the result
sizeGrWindow(7, 6)
plot(METree, main = "Clustering of module eigengenes",
     xlab = "", sub = "")

merge with correlation > 0.8

MEDissThres = 0.2
# Plot the cut line into the dendrogram
plot(METree, main = "Clustering of module eigengenes",
     xlab = "", sub = "")
abline(h=MEDissThres, col = "red")

# Call an automatic merging function
merge = mergeCloseModules(lcpm.filter.t, dynamicColors, cutHeight = MEDissThres, verbose = 3)
 mergeCloseModules: Merging modules whose distance is less than 0.2
   multiSetMEs: Calculating module MEs.
     Working on set 1 ...
     moduleEigengenes: Calculating 34 module eigengenes in given set.
   multiSetMEs: Calculating module MEs.
     Working on set 1 ...
     moduleEigengenes: Calculating 23 module eigengenes in given set.
   Calculating new MEs...
   multiSetMEs: Calculating module MEs.
     Working on set 1 ...
     moduleEigengenes: Calculating 23 module eigengenes in given set.
# The merged module colors
mergedColors = merge$colors
# Eigengenes of the new merged modules:
mergedMEs = merge$newMEs

compare pre and post merge

sizeGrWindow(12, 9)
#pdf(file = "Plots/geneDendro-3.pdf", wi = 9, he = 6)
plotDendroAndColors(geneTree, cbind(dynamicColors, mergedColors),
                    c("Dynamic Tree Cut", "Merged dynamic"),
                    dendroLabels = FALSE, hang = 0.03,
                    addGuide = TRUE, guideHang = 0.05)

#dev.off()
# Rename to moduleColors
moduleColors = mergedColors
# Construct numerical labels corresponding to the colors
colorOrder = c("grey", standardColors(50));
moduleLabels = match(moduleColors, colorOrder)-1;
MEs = mergedMEs 
table(merge$colors)

         black           blue          brown           cyan      darkgreen 
          1195           6459           1505            496            710 
      darkgrey    darkmagenta darkolivegreen        darkred  darkturquoise 
           248             46             70            306            249 
         green      lightcyan     lightgreen    lightyellow   midnightblue 
          2135            970           1643            516            485 
        orange  paleturquoise      royalblue    saddlebrown            tan 
           213            739            490            172           1797 
        violet          white         yellow 
            75            196           1341 
length(table(merge$colors))
[1] 23
median(table(merge$colors))
[1] 496

Look at modules

Which module is LFY in?

CrLFY1 <- "Ceric.33G031700" 

CrLFY2 <- "Ceric.18G076300"
module.assignment <- tibble(geneID=colnames(lcpm.filter.t), module = mergedColors)

module.assignment %>%
  filter(str_detect(geneID, "18G076300|33G031700"))
module.assignment %>% group_by(module) %>% summarize(n_genes = n()) %>% arrange(n_genes)

Plot eigengenes

Make sure sample info sheet is in the correct order.

rownames(lcpm.filter.t) %>% str_replace_all("\\.", "-") == sample.description$sample
  [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
 [17] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
 [33] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
 [49] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
 [65] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
 [81] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
 [97] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
sample.eigen <- cbind(sample.description, MEs)
sample.eigen
sample.eigen.mean <- sample.eigen %>%
  group_by(group) %>%
  summarize(across(starts_with("ME"), mean),
            label=unique(label))
sample.eigen %>%
  pivot_longer(starts_with("ME"), names_to = "ME") %>%
  ggplot(aes(y=label, x = value)) +
  geom_point() +
  facet_wrap(~ME, ncol=5) +
  theme(axis.text.y = element_text(size = 6))

A heat map:

sample.eigen.mean$group %>% sort
 [1] "CrLFY1-OX-S5"                                
 [2] "CrLFY1-OX-WYS"                               
 [3] "CrLFY2-OX-S5"                                
 [4] "CrLFY2-OX-WYS"                               
 [5] "Cross-S5"                                    
 [6] "Cross-WYS"                                   
 [7] "PRJEB33372-frond"                            
 [8] "PRJNA1149654-whole sporophyte DMSO"          
 [9] "PRJNA1149654-whole sporophyte IAA"           
[10] "PRJNA555841-30 day whole sporophyte 24h 2-4D"
[11] "PRJNA555841-30 day whole sporophyte 38h 2-4D"
[12] "PRJNA555841-30 Day whole sporophyte mock"    
[13] "PRJNA578676-leaf tip"                        
[14] "PRJNA578676-leaf-no tip"                     
[15] "PRJNA578676-root tip"                        
[16] "PRJNA578676-root-no tip"                     
[17] "PRJNA578676-shoot tip"                       
[18] "PRJNA651764-developing leaf"                 
[19] "PRJNA651765-expanding leaf"                  
[20] "PRJNA651766-sterile leaf"                    
[21] "PRJNA651767-fertile leaf"                    
[22] "PRJNA651768-sori"                            
[23] "PRJNA651771-stem"                            
[24] "PRJNA651772-root"                            
[25] "PRJNA651773-young sporophyte"                
[26] "PRJNA666635-0mins-aba-high-br"               
[27] "PRJNA666635-0mins-dry-high-br"               
[28] "PRJNA666635-0mins-wet-high-br"               
[29] "PRJNA666635-60mins-abamock-low-br"           
[30] "PRJNA666635-60mins-dryaba-high-br"           
[31] "PRJNA666635-60mins-dryaba-low-br"            
[32] "PRJNA666635-60mins-drymock-high-br"          
[33] "PRJNA666635-60mins-drymock-low-br"           
[34] "PRJNA666635-60mins-wetmock-low-br"           
[35] "PRJNA681601-Cr_BAM"                          
[36] "PRJNA681601-Cr_Callus"                       
[37] "PRJNA681601-Cr_Leaf"                         
[38] "PRJNA681601-Cr_Root"                         
[39] "PRJNA681601-Cr_SAM"                          
[40] "PRJNA857489-differentiated root"             
[41] "PRJNA857489-root tip"                        
[42] "PRJNA857489-shoot"                           
[43] "RNAi-S5"                                     
[44] "RNAi-WYS"                                    
[45] "WT-S5"                                       
[46] "WT-WYS"                                      
sample.eigen.mean$label %>% sort
 [1] "0mins-aba-high-br"                "0mins-dry-high-br"               
 [3] "0mins-wet-high-br"                "30 day whole sporophyte 24h 2-4D"
 [5] "30 day whole sporophyte 38h 2-4D" "30 Day whole sporophyte mock"    
 [7] "60mins-abamock-low-br"            "60mins-dryaba-high-br"           
 [9] "60mins-dryaba-low-br"             "60mins-drymock-high-br"          
[11] "60mins-drymock-low-br"            "60mins-wetmock-low-br"           
[13] "Cr_BAM"                           "Cr_Callus"                       
[15] "Cr_Leaf"                          "Cr_Root"                         
[17] "Cr_SAM"                           "CrLFY1-OX-S5"                    
[19] "CrLFY1-OX-WYS"                    "CrLFY2-OX-S5"                    
[21] "CrLFY2-OX-WYS"                    "Cross-S5"                        
[23] "Cross-WYS"                        "developing leaf"                 
[25] "differentiated root"              "expanding leaf"                  
[27] "fertile leaf"                     "frond"                           
[29] "leaf tip"                         "leaf-no tip"                     
[31] "RNAi-S5"                          "RNAi-WYS"                        
[33] "root"                             "root tip"                        
[35] "root tip"                         "root-no tip"                     
[37] "shoot"                            "shoot tip"                       
[39] "sori"                             "stem"                            
[41] "sterile leaf"                     "whole sporophyte DMSO"           
[43] "whole sporophyte IAA"             "WT-S5"                           
[45] "WT-WYS"                           "young sporophyte"                
MEs.m <- sample.eigen.mean %>% mutate(label=make.names(label, unique = TRUE)) %>% column_to_rownames("label") %>% select(starts_with("ME")) %>% as.matrix()
heatmap.2(MEs.m, trace="none", cexRow= 0.6, col="bluered")

save(module.assignment, MEs, lcpm.filter, CrLFY1, CrLFY2, file="../output/WGCNA_sporophyte_all.Rdata")
---
title: "04_WGCNA"
author: "Julin Maloof"
date: "2025-02-16"
output: html_notebook
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

```{r}
library(tidyverse)
library(WGCNA)
library(gplots)
options(stringsAsFactors = FALSE)
```

load sample info
```{r}
sample.description <- read.csv("../output/sample.description.sporophyte.all.csv")
```


load reads

```{r}
lcpm <- read.csv("../output/sporophyte_combined_log2cpm.csv.gz", row.names = 1, check.names = FALSE)
head(lcpm)
dim(lcpm)
```

Filter for genes with the highest coefficient of variation

```{r}
CV <- apply(lcpm, 1, \(x) abs(sd(x)/mean(x)))
hist(log10(CV))
```

```{r}
names(CV) <- rownames(lcpm)
CV[str_detect(names(CV), "18G076300|33G031700")]
```

```{r}
quantile(CV, 0.25)
```

LFY2 has a pretty low CV; have to include 25% of the genes by CV to include it.
```{r}
lcpm.filter <- lcpm[CV > quantile(CV, 0.25),]
dim(lcpm.filter)
```




WGCNA wants genes in columns

```{r}
lcpm.filter.t <- t(lcpm.filter)
```


Soft thresholding
```{r}
powers <- c(c(1:10), seq(from = 12, to=20, by=2))
sft <- pickSoftThreshold(lcpm.filter.t, powerVector = powers, verbose = 5,networkType = "signed hybrid", blockSize = 20000)
```

```{r}
sizeGrWindow(9, 5)
par(mfrow = c(1,2))
cex1 <- 0.9
# Scale-free topology fit index as a function of the soft-thresholding power
plot(sft$fitIndices[,1], -sign(sft$fitIndices[,3])*sft$fitIndices[,2],
     xlab="Soft Threshold (power)",ylab="Scale Free Topology Model Fit,signed R^2",type="n",
     main = paste("Scale independence"))
text(sft$fitIndices[,1], -sign(sft$fitIndices[,3])*sft$fitIndices[,2],
     labels=powers,cex=cex1,col="red")
# this line corresponds to using an R^2 cut-off of h
abline(h=0.90,col="red")
# Mean connectivity as a function of the soft-thresholding power
plot(sft$fitIndices[,1], sft$fitIndices[,5],
     xlab="Soft Threshold (power)",ylab="Mean Connectivity", type="n",
     main = paste("Mean connectivity"))
text(sft$fitIndices[,1], sft$fitIndices[,5], labels=powers, cex=cex1,col="red")
```
choose 5

```{r}
softPower <- 5
adjacency <- adjacency(lcpm.filter.t, power = softPower, type = "signed hybrid")
# Turn adjacency into topological overlap
TOM <- TOMsimilarity(adjacency, TOMType = "signed");
dissTOM <- 1-TOM
```

```{r}
# Call the hierarchical clustering function
geneTree <- hclust(as.dist(dissTOM), method = "average")
# Plot the resulting clustering tree (dendrogram)
sizeGrWindow(12,9)
plot(geneTree, xlab="", sub="", main = "Gene clustering on TOM-based dissimilarity",
     labels = FALSE, hang = 0.04)
```

define modules

```{r}
# We like large modules, so we set the minimum module size relatively high:
minModuleSize <- 30;
# Module identification using dynamic tree cut:
dynamicMods <- cutreeDynamic(dendro = geneTree, distM = dissTOM,
                             deepSplit <- 2, pamRespectsDendro = FALSE,
                             minClusterSize = minModuleSize);
table(dynamicMods)
```

```{r}
# Convert numeric labels into colors
dynamicColors = labels2colors(dynamicMods)
table(dynamicColors)
# Plot the dendrogram and colors underneath
sizeGrWindow(8,6)
plotDendroAndColors(geneTree, dynamicColors, "Dynamic Tree Cut",
                    dendroLabels = FALSE, hang = 0.03,
                    addGuide = TRUE, guideHang = 0.05,
                    main = "Gene dendrogram and module colors")
```

merge similar modules

```{r}
# Calculate eigengenes
MEList <- moduleEigengenes(lcpm.filter.t, colors = dynamicColors)
MEs <- MEList$eigengenes
# Calculate dissimilarity of module eigengenes
MEDiss <- 1-cor(MEs);
# Cluster module eigengenes
METree <- hclust(as.dist(MEDiss), method = "average");
# Plot the result
sizeGrWindow(7, 6)
plot(METree, main = "Clustering of module eigengenes",
     xlab = "", sub = "")
```

merge with correlation > 0.8
```{r}
MEDissThres = 0.2
# Plot the cut line into the dendrogram
plot(METree, main = "Clustering of module eigengenes",
     xlab = "", sub = "")
abline(h=MEDissThres, col = "red")
# Call an automatic merging function
merge = mergeCloseModules(lcpm.filter.t, dynamicColors, cutHeight = MEDissThres, verbose = 3)
# The merged module colors
mergedColors = merge$colors
# Eigengenes of the new merged modules:
mergedMEs = merge$newMEs
```

compare pre and post merge
```{r}
sizeGrWindow(12, 9)
#pdf(file = "Plots/geneDendro-3.pdf", wi = 9, he = 6)
plotDendroAndColors(geneTree, cbind(dynamicColors, mergedColors),
                    c("Dynamic Tree Cut", "Merged dynamic"),
                    dendroLabels = FALSE, hang = 0.03,
                    addGuide = TRUE, guideHang = 0.05)
#dev.off()
```

```{r}
# Rename to moduleColors
moduleColors = mergedColors
# Construct numerical labels corresponding to the colors
colorOrder = c("grey", standardColors(50));
moduleLabels = match(moduleColors, colorOrder)-1;
MEs = mergedMEs 
table(merge$colors)
length(table(merge$colors))
median(table(merge$colors))

```

## Look at modules

Which module is LFY in?

```{r}
CrLFY1 <- "Ceric.33G031700" 

CrLFY2 <- "Ceric.18G076300"
```

```{r}
module.assignment <- tibble(geneID=colnames(lcpm.filter.t), module = mergedColors)

module.assignment %>%
  filter(str_detect(geneID, "18G076300|33G031700"))
```

```{r}
module.assignment %>% group_by(module) %>% summarize(n_genes = n()) %>% arrange(n_genes)
```

Plot eigengenes

Make sure sample info sheet is in the correct order.
```{r}
rownames(lcpm.filter.t) %>% str_replace_all("\\.", "-") == sample.description$sample
```

```{r}
sample.eigen <- cbind(sample.description, MEs)
sample.eigen
```

```{r}
sample.eigen.mean <- sample.eigen %>%
  group_by(group) %>%
  summarize(across(starts_with("ME"), mean),
            label=unique(label))
```


```{r, fig.height=10, fig.width=10}
sample.eigen %>%
  pivot_longer(starts_with("ME"), names_to = "ME") %>%
  ggplot(aes(y=label, x = value)) +
  geom_point() +
  facet_wrap(~ME, ncol=5) +
  theme(axis.text.y = element_text(size = 6))
```
A heat map:

```{r}
sample.eigen.mean$group %>% sort
sample.eigen.mean$label %>% sort

```

```{r, fig.height=7}
MEs.m <- sample.eigen.mean %>% mutate(label=make.names(label, unique = TRUE)) %>% column_to_rownames("label") %>% select(starts_with("ME")) %>% as.matrix()
heatmap.2(MEs.m, trace="none", cexRow= 0.6, col="bluered")
```


```{r}
save(module.assignment, MEs, lcpm.filter, CrLFY1, CrLFY2, file="../output/WGCNA_sporophyte_all.Rdata")
```

